Brian,

Don't know what your take is on cleaning the Criterion barrel, but the one I have is a dream to clean. I gave my barrel a good normal cleaning and a dose of Sweet's to look for any copper collection this morning. Saw a very dim trace after 35 rounds. Just finished loading some Hornady 174s for further testing. Shot some of these bullets yesterday in pulled bullet ammo and felt good about the results. Felt pretty good about the 71 year old eyes too. They are one of the few things still working.